******

"Oh god, that's deep!" She start shaking, as an orgasm overtakes her, and her knees buckle. She collapses to the floor, pulling off me with an unmistakable sucking sound, moaning, and shaking, as a small puddle begins to leak between her thighs.

Stacy's hand is still within her sister, but I removed it, as I got between Stephanie's legs, then I slide into her with ease, but not quite going all the way in, then I smile as her eyes roll back in to her head.

Grabbing a breast in each hand, I started up a nice slow rhythm, both of us moaning at our blissful connection.

Stacy finally recovers on the floor, and stood back up. She smiles down at us, and then reaches down to where we are connected and starts playing with her twin's clit. This puts her breasts right by my mouth, and I was not going to pass up that meal.

With a tit in each hand, and another in my mouth, I did not think life can get any better.

A few seconds later it does, as Stephanie cums hard, ecstasy wracking her body, as she twists and writhes against my invading pole and her sister's fingers. She was moaning so loudly and gripping me so tightly, I start to cum too. My own body locks up, as I deposit my load into half of this beautiful geek team.

Exhausted, I fall back on the couch, releasing all three tits, and slipping out of Stephanie.

I watch through blurry eyes, as Stacy dived between her sister's thighs, and starts to suck my cum out of her sister.

"Oh, Stacy! Yes right there, lick me there. Ohhhh, you know right what to do! Oh, fuck, you're gonna make me cum again. Oh fuck, oh fuck, OH FUCK!" Stephanie's fingers are tangled in her sister's hair, as she cries out in incestuous bliss.

When Stephanie finally relaxes, and calm down from her bliss, her eyes grew wide, and she backed away from her sister.

"What made you do that?" she demanded.

I can't tell if she's angry, just out of breath, or merely curious, and worry starts to seep into my gut.

"I'm sorry," I apologise to her, not wanting there to be any bad blood between the two of them.

"I asked her to." I said.

Stephanie stares at me incredulously until her sister speaks up.

"I wouldn't have done it if I didn't want to, Stephanie. He might have asked me, but I've wanted to try that for a while now."

"But we're SISTERS!" Stephanie exclaims. "That's incest!"

"You didn't complain at the time I was doing you," Stacy argues in a tone that makes it hard to argue back.

"Yes, but… well, I did enjoy it, but…" The anger slowly leaches out of Stephanie, leaving only curiosity.

"You wanted to? But we only agreed to share boyfriend, not each other." Stephanie said.

I wonder briefly if this means I've been upgraded from really good friend status to boyfriend. It also makes me wonder again, am I the only one they've done this with, or their are others. Either way, I truly don't have any complaints right now.

"I only agreed to that because I thought that was what you wanted," Stacy said, and we all laughed at that.

The two sisters hug each other tightly until I complain about being left out. Then they both tackle me, laughing as they attempt to tickle me.

With my current strength however, I easily get the better of the two and soon have both of them squealing with beautiful laughter.

Next thing I know, Stephanie turns the tables on me as she sucks my cock between her lips, and I realize that I've grown hard once more.

The only thing I can think of as to why I'm recovering so quickly after having sex was because of that marathon sex session with Vage…..

…..

By the end of the night, none of us know where one body ends and another begins.

And yet Vage still doesn't come to get me again…..

~~2days later~~

The sun shines pleasantly as we drive south. The roads are dry, though the sides are piled up high with snow. All in all it was a pleasant Sunday drive. At least, it would've been if not for a couple of things. Nancy was sitting in the back seat, humming softly to herself, and Vage had refused to talk to me again last night.

Nancy's presence doesn't bother me as much as Vage's attitude.

When I'd called my family to see if Tina could come down to my place for holiday, my mom had asked after her mom, and then insisted that I invite her as well. Nancy had hemmed and hawed at first, but Tina convinced her it would be good to not be alone for the holidays. And I just kept my mouth shut. I didn't want to influence her decision, and to be honest, I really don't know how I felt about it. A part of me was hoping to get some alone time with Tina, but that's less likely to happen with her mom around.

Then there's the issue of the chance of my family finding out what I'd done with the two women. Somehow I'm sure my parents would freak out, especially my dad. My sister might take it better, but she's not likely to be there after that last blow-up with our father, even if it is Christmas. No matter what, I don't want it getting out.

Yesterday had flown by, as Stephanie, Stacy, and I recovered from the night's exertions, sleeping most of the day. I'd gone to see Tina after calling my mom that evening, and she was ecstatic as she packed. The two women had decide to go do some shopping, and I left them to it, realizing I would have to do some extra Christmas shopping myself, ordering gifts for the twins, and wrapping Tina's.

I'm not sure if I should get anything for Prof Jane, and figure propriety dictates otherwise. I don't want her to get her in any trouble, if someone were to find out.

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